Application Protocols enabling Internet of Remote Things via Random Access Satellite Channels

Nowadays, Machine-to-Machine (M2M) and Internet of Things (IoT) traffic rate is increasing at a fast pace. The use of satellites is expected to play a large role in delivering such a traffic. In this work, we investigate the use of two of the most common M2M/IoT protocols stacks on a satellite Random Access (RA) channel, based on DVB-RCS2 standard. The metric under consideration is the completion time, in order to identify the protocol stack that can provide the best performance level

Performance Analysis of WebRTC-based Video Streaming over Power Constrained Platforms

This work analyses the use of the WebRTC framework on resource-constrained platforms. WebRTC is a consolidated solution for real-time video streaming, and it is an appealing solution in a wide range of application scenarios. We focus our attention on those in which power consumption, size and weight are of paramount importance because of size, weight and power requirements, such as the use case of unmanned aerial vehicles delivering real-time video streams overWebRTC to peers on the ground. The testbed described in this work shows that the power consumption can be reduced by changing WebRTC default settings while maintaining comparable video quality

Monitoring Ancient Buildings: Real Deployment of an IoT System Enhanced by UAVs and Virtual Reality

The historical buildings of a nation are the tangible signs of its history and culture. Their preservation deserves considerable attention, being of primary importance from a historical, cultural, and economic point of view. Having a scalable and reliable monitoring system plays an important role in the Structural Health Monitoring (SHM): therefore, this paper proposes an Internet Of Things (IoT) architecture for a remote monitoring system that is able to integrate, through the Virtual Reality (VR) paradigm, the environmental and mechanical data acquired by a wireless sensor network set on three ancient buildings with the images and context information acquired by an Unmanned Aerial Vehicle (UAV). Moreover, the information provided by the UAV allows to promptly inspect the critical structural damage, such as the patterns of cracks in the structural components of the building being monitored. Our approach opens new scenarios to support SHM activities, because an operator can interact with real-time data retrieved from a Wireless Sensor Network (WSN) by means of the VR environment

Generalized Encoding CRDSA: Maximizing Throughput in Enhanced Random Access Schemes for Satellite

This work starts from the analysis of the literature about the Random Access protocols with contention resolution, such as Contention Resolution Diversity Slotted Aloha (CRDSA), and introduces a possible enhancement, named Generalized Encoding Contention Resolution Diversity Slotted Aloha (GE-CRDSA). The GE-CRDSA aims at improving the aggregated throughput when the system load is less than 50%, playing on the opportunity of transmitting an optimal combination of information and parity packets frame by frame. This paper shows the improvement in terms of throughput, by performing traffic estimation and adaptive choice of information and parity rates, when a satellite network undergoes a variable traffic load profile

Advances on Elastic Traffic via M2M Satellite User Terminals

Owing to the variety of traffic profiles that Machine to Machine and Internet of Things applications may generate, this work studies the applicability of the Contention Resolution Diversity Slotted ALOHA (CRDSA) random access scheme, as in the DVB-RCS2 standard, when clusters of sensor nodes exchange data via satellite toward a sink via short-lived TCP/IP connections. In this scenario, uncorrelated sensor sources generate measurements, which are multiplexed by a satellite terminal, before being encapsulated and delivered through TCP/IP flows. This work aims at investigating the scalability in terms of number of concurrent satellite terminals, which can successfully transfer their own data with a small delivery delay in order to avoid congestion phenomena at MAC layers, which may induce collision storms. This work assesses the best practice for M2M elastic traffic wia random access satellite, investigating on crosslayer interactions between access layer and transport/application layers

Advances on Elastic Traffic via M2M Satellite User Terminals

Owing to the variety of traffic profiles that Machine to Machine and Internet of Things applications may generate, this work studies the applicability of the Contention Resolution Diversity Slotted ALOHA (CRDSA) random access scheme, as in the DVB-RCS2 standard, when clusters of sensor nodes exchange data via satellite toward a sink via short-lived TCP/IP connections. In this scenario, uncorrelated sensor sources generate measurements, which are multiplexed by a satellite terminal, before being encapsulated and delivered through TCP/IP flows. This work aims at investigating the scalability in terms of number of concurrent satellite terminals, which can successfully transfer their own data with a small delivery delay in order to avoid congestion phenomena at MAC layers, which may induce collision storms. This work assesses the best practice for M2M elastic traffic wia random access satellite, investigating on crosslayer interactions between access layer and transport/application layers

TCP-Based M2M traffic via random-access satellite links: throughput estimation

Provisioning of Internet of Things/machine-to-machine (M2M) services over satellite has been experiencing a continuous growth in the last few years, which is expected to further increase in the near future so as to meet the demands of users and enterprises. The design of a suitable network architecture is, hence, of paramount importance to properly take into account the requirements imposed by the technology available nowadays and to properly consider the interaction of the so-defined physical layer with transport and application layers. In this light, this paper analyzes the use case of TCP-basedM2M services operating over DVB-RCS2 satellite links, where a contention resolution diversity slotted ALOHA access scheme is applied. The main goal of this paper is to provide a thorough understanding of the interactions of TCP and random access schemes, recognized as key elements to enable efficient M2M services over satellite. In this regard, this paper also develops a novel TCP throughput model, which has been validated through extensive simulation campaigns, proving the value of the proposed theoretical framework and its applicability to study the performance of M2M services in more general satellite scenarios